1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* Generic I/O port emulation. 3 * 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 #ifndef __ASM_GENERIC_PCI_IOMAP_H 8 #define __ASM_GENERIC_PCI_IOMAP_H 9 10 struct pci_dev; 11 #ifdef CONFIG_PCI 12 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ 13 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); 14 extern void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max); 15 extern void __iomem *pci_iomap_range(struct pci_dev *dev, int bar, 16 unsigned long offset, 17 unsigned long maxlen); 18 extern void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, 19 unsigned long offset, 20 unsigned long maxlen); 21 /* Create a virtual mapping cookie for a port on a given PCI device. 22 * Do not call this directly, it exists to make it easier for architectures 23 * to override */ 24 #ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP 25 extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port, 26 unsigned int nr); 27 #else 28 #define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr)) 29 #endif 30 31 #elif defined(CONFIG_GENERIC_PCI_IOMAP) 32 static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) 33 { 34 return NULL; 35 } 36 37 static inline void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max) 38 { 39 return NULL; 40 } 41 static inline void __iomem *pci_iomap_range(struct pci_dev *dev, int bar, 42 unsigned long offset, 43 unsigned long maxlen) 44 { 45 return NULL; 46 } 47 static inline void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar, 48 unsigned long offset, 49 unsigned long maxlen) 50 { 51 return NULL; 52 } 53 #endif 54 55 #endif /* __ASM_GENERIC_IO_H */ 56